The utility model discloses a construction elevator safety supervision system, including the mains operated module, the mains operated module be connected with the singlechip, the singlechip be connected with control button and module, output display ware, alarm, latch, camera, fingerprint punched -card machine, lift running state input module and the background data computer of reseing respectively. The utility model discloses a singlechip has many -sided advantages such as overload alarm, the warning of superman person, trouble suggestion, sets up functions such as the lift is through, scram, interruption maintenance moreover to realize the intellectual detection system of lift, improve the safety guarantee of lift.